Abstract: A ratchet block comprised of a frame, moveable sheave assembly, ratchet assembly and cam wherein the ratchet automatically engages under load permitting rotation of the sheave in only one direction, and disengages when the load is removed permitting rotation in both directions. This automatic engagement and disengagement of the ratchet to increase or reduce friction when a rope or wire is run through the sheave does not require the user to disengage the ratchet mechanism with a conventional switch.

Abstract: Masthead device for sailboats that indicates apparent wind direction composed of a rotating wind vane and a protractor arm encompassing multiple reference marks. These marks can be adjusted with greater compass accuracy to allow several settings in each quadrant creating a series of reference points enabling one to more accurately determine the apparent wind angle from a center point, and thus optimize sail trim, heading and boat speed.